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测定了几种参照液体在改性明胶涂层及凝胶表面上的接触角,定量地估算了涂层及凝胶表面自由能并与明胶作比较;加入不同类型表面活性剂对表面自由能的影响不同;非离子型表面活性剂能大大改善涂层及凝胶表面的润湿性,而阳离子表面活性剂在一定浓度下可使凝胶表面更加憎水化。本文对上述实验结果作了初步解释。
The contact angle of several reference liquids on the surface of modified gelatin coating and gel was measured, the free energy of coating and gel surface was estimated quantitatively and compared with that of gelatin. When different types of surfactants were added to the surface free energy The effect is different; nonionic surfactant can greatly improve the wettability of the coating and the gel surface, and the cationic surfactant can make the surface of the gel more hydrophobic at a certain concentration. This article gives a preliminary explanation of the above experimental results.